static JPanel showFormTitled_customArrangement(final bool internalFrame, final F1<L<JComponent>, JPanel> arrange, fS title, fO... _parts) {
  ret swing(func -> JPanel {
    L<JComponent> out = showForm_arrange1(showForm_makeComponents(internalFrame, _parts));
    JPanel panel = callF(arrange, out);
    showForm_makeFrame(title, panel);
    ret panel;
  });
}